The Great White Dragon is rarely seen. Nobody knows where he slumbers, but they do know his cave is on one of the highest peaks in the world. Only few stories have made it to be Known about across the lands. Few ever made it back to there home villages to tell the story.
A planet (or city, valley ect) where those who enter witness protection can escape old age and death itself, so they can live for centuries without aging-provided they maintain their cover perfectly. If they are outed by anyone or ever utter their true name, they age the number of years they have not aged since the day they entered witness protection (which might mean that they age centuries in seconds and crumble into dust and bone.)